<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>待办事项</title>
</head>
<body>
    <div class="container">
        <div>
            <input type="text" class="input">
            <input type="button" class="button" value="新建任务">
        </div>

        <div style="margin-top: 25px;">
            <span class="content">未完成</span>
            <span class="content">已完成</span>
        </div>
        
        <div style="margin-top: 10px; ">
            <input type="checkbox"> 吃饭
            <input type="button" value="删除"> 
        </div>

    </div>


    
</body>
    <style>

        .container {
            margin-top: 50px;
            text-align: center;
        }
        .content {
            width: 300px;
            height: 40px;
            background-color: darkgrey;
            color: white;
            font-size: 10;
            font-weight: 600;
            display: inline-block;
            text-align: center;
            line-height: 40px;
            margin: 0 0;
        }
        * {
            padding: 0;
            margin: 0;
        }
        .button {
            width: 100px;
            height: 40px;
            background-color: orange;
            color: white;
            font-size: 10px;
            border: none;
        }
        .input {
            width: 500px;
            height: 40px;
            text-indent: 10px;
            /* padding: 10px; */
            box-sizing: border-box;
            outline: none;
            /* border: none; */
        }
    </style>

</html>